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CHAST to NZDT Converter

CHAST
Chatham Island Standard Time
GMT +12:45
12am
3am
6am
9am
12pm
3pm
6pm
9pm
NZST/NZDT
New Zealand Standard Time
GMT +12
12am
3am
6am
9am
12pm
3pm
6pm
9pm
NZDT is not used on May 22, 2026

This converter uses NZST for New Zealand.

Keep NZDT (GMT +13)

Compare CHAST time with NZDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Chatham Island Standard Time is 0 hours and 45 minutes ahead of New Zealand Standard Time
10:00 am10:00 in CHAST is 9:15 am09:15 in NZST

CHAST to NZST call time
Best time for a conference call or a meeting is between 9:45am-5pm in CHAST which corresponds to 9am-4:15pm in NZST

10:00 am10:00 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours
9:15 am09:15 New Zealand Standard Time (NZST). Offset UTC +12:00 hours

10:00 am10:00 CHAST / 9:15 am09:15 NZST

CHASTNZST
12am (midnight)11:15 pm
1am12:15 am
2am1:15 am
3am2:15 am
4am3:15 am
5am4:15 am
6am5:15 am
7am6:15 am
8am7:15 am
9am8:15 am
10am9:15 am
11am10:15 am
12pm (noon)11:15 am
1pm12:15 pm
2pm1:15 pm
3pm2:15 pm
4pm3:15 pm
5pm4:15 pm
6pm5:15 pm
7pm6:15 pm
8pm7:15 pm
9pm8:15 pm
10pm9:15 pm
11pm10:15 pm
00:0023:15
01:0000:15
02:0001:15
03:0002:15
04:0003:15
05:0004:15
06:0005:15
07:0006:15
08:0007:15
09:0008:15
10:0009:15
11:0010:15
12:0011:15
13:0012:15
14:0013:15
15:0014:15
16:0015:15
17:0016:15
18:0017:15
19:0018:15
20:0019:15
21:0020:15
22:0021:15
23:0022:15

Chatham Island Standard Time

Offset: CHAST is 12 hours and 45 minutes ahead Greenwich Mean Time (GMT) and is used in Pacific

Countries using this time zone: New Zealand

CHAST Time Zone Geo Map
CHAST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Chatham Island Daylight Time (CHADT).

Start: Chatham Island Standard Time (CHAST) started on Sunday, April 5, 2026 at 3:45 am local time and clocks were set one hour back to Sunday, April 5, 2026, 2:45 am. Standard time starts annually on the first Sunday of April.

End: Chatham Island Standard Time (CHAST) ends on Sunday, September 27, 2026 at 2:45 am local time and clocks are set one hour forward to Sunday, September 27, 2026, 3:45 am local daylight time instead. Standard time ends annually on the last Sunday of September.

CHAST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1245 - basic
  • +12:45 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1245 - sign character (+) followed by a four digit time providing hours (12) and minutes (45) of the offset. Indicates an offset of twelve hours and forty-five minutes to the east of the zero meridian.

New Zealand Daylight Time

Offset: NZDT is 13 hours ahead Greenwich Mean Time (GMT) and is used in Pacific

Countries using this time zone: Antarctica, New Zealand

Principal Cities: The largest city in the NZDT time zone is Auckland in New Zealand, with about 1.535 million people. Other major cities in this time zone include Wellington, Christchurch, Hamilton, Tauranga.

NZDT Time Zone Geo Map
NZDT timezone map

Daylight Saving: New Zealand Daylight Time (NZDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe New Zealand Standard Time (NZST).

Daylight saving time clock moves forward for one hour from 3am to 4amEnd: New Zealand Daylight Time (NZDT) ended on Sunday, April 5, 2026 at 3:00 am local time and clocks were set one hour back to Sunday, April 5, 2026, 2:00 am local standard time instead. Daylight saving ends annually on the first Sunday of April

Daylight saving time clock moves back for one hour from 2am to 1amStart: New Zealand Daylight Time (NZDT) starts on Sunday, September 27, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, September 27, 2026, 3:00 am. Daylight saving starts annually on the last Sunday of September

NZDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +13 - basic short
  • +1300 - basic
  • +13:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1300 - sign character (+) followed by a four digit time providing hours (13) and minutes (00) of the offset. Indicates an offset of thirteen hours to the east of the zero meridian.
IANA/Olson: Reflects NZDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Antarctica/McMurdo
  • Antarctica/South_Pole
  • NZ
  • Pacific/Auckland
Time zones with the GMT +13 offset:
  • FJST - Fiji Summer Time
  • NZDT - New Zealand Daylight Time
  • PHOT - Phoenix Island Time
  • TKT - Tokelau Time
  • TOT - Tonga Time
  • WST - West Samoa Time
  • WSST - West Samoa Standard Time
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT